Plate-glass-annealing leer



March 17, 1925. 1,530,190

E. E. MILNER ET AL PLA TE GLASS ANNEALING LEER Filed June F, 1921, 2 Sheet -Sheec 1 INVENTORS Y M 53. Wfiaw E E. MELNER ET AL PLATE GLASS ANNEALING LEER Filed June .1

, 1921 2 Sheets-Sheet 2 m k W W m W INVENTOR$ & QMW

Patented Mar. 17, 1925 UNITED STATES PATENT, OFFICE.

EDWIN E. MILNEB, OF SCOTT TOWNSHIP, ALLEGHENY COUNTY, AND WILLIAM J. LYTLE, 0F ROSSLYN FARMS BOROUGH, PENNSYLVANIA, ASSIGNORS T0 II. L. DIXON COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PLATE-GLAss-ANNEALING LEER.

Application filed June 15,

To all whom it may concern:

Be it known that we, EDWIN E. MILNEB and W'ILLLAM J. LYTLE, citizens of the United States, residing, respectively in Scott Township and Rosslyn Farms orough, both in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Plate-Glass-Annealin Leers, of which the following is a full, 0 ear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal vertical section of a ortion of a plate glass annealing leer embodying our invention, the plane of secdtion being on the line Il of Figure 2; an r Figure 2 is a section on the line 11-11 of Fi re 1.

ur invention has relation to plate glass annealing leers', and is designed to provide a muflle type of leer having effective means for producing and maintaining the proper temperature within the mufile chamber. The invention also provides a muflie leer in which the oven portion of the leer can be arranged in a straight line with the leer end.

The particular nature of our invention I will be best understood by reference to the accompanyin drawings, in which we have shown a pre erred embodiment thereof and which will now be described, it being premised, however, that various changes may be made in the details of construction, ar rangement .nd combination of the various parts without departing from the spirit and scope of .our invention as defined by the appended claims.

In these drawings, the numeral 2 designates the frame of the leer and 3 the outer masonry walls thereof. 4 is the muflle chamber into the rear end portion of which the glass plates to be annealed are introduced.

through a lateral opening, such as shown at 5 in Figure 1. 6 is the usual refractory botwall of P tom of the mufile chamber. The top the muflle chamber is composed ma nly of a plurality of longitudinally extendmg flues 7, these flues being arranged s1de by Side and extending substantially the full length of the chamber. The may be conveniently; formed of hollow ti es, either of integra construction or-built up of separate top and 1921. Serial No. 477,619.

side members, as indicated in Figure 2.

The top walls of the lines 7 may be reinforced by a layer 11 of bricks or other refractory material set between the key blocks.

At its rear ,end each of the flues 7 communicates with a vertical combustion chamber 12 which extends upwardly through the rear end wall of the muflle chamber. There is one of these combustion chambers for each of the longitudinal flues. Each combustion chamber is' provided with a suitable burner arrangement. In the construction 'shown in the drawings, the leer is arranged to be fired either by producer gas or by natural gas. When producer as 1s used, the gas is brought in through t e flue or tunnel 13. This flue has a series of openings 14 in its top wall, one for each combustion chamber, and opening into a box 15 which discharges into the lower portion of the combustlon chamber. Air enters t e lower portionpf the combustion chamber through an opening 16 which is controlled by a suitable valve or damper 17. This valve or dam or is shown ed to the end of the hollow valve rod or l i stem 18: The gas discharged into each'combustion chamber is controlled by an suitable valve, such as the swinging va ve 21, carried by the rock shaft 22 having the actuating connection 23 for manual operation.

When natural. gas is employed, the valve 21 is closed and the supply of natural gas regulated by a suitable valve 24 in the supply It will be understood that each of the combustion chambers is supplied with its own individual burner and with its own gas and air supply connection so that the combustion in each chamber may be independently re lated.

ach of the fiues 7 is provided with a,plu-

of off-take connections are rality of vertical off-takes 25 at difierent points in its length. These off-takes communicate with a series of transverse flues 26 which, in turn, open into a longitudinal pipe or flue 27 leading to the stack 28. Each of the connections 25 has a control valve or damper 29.

In the particular leer illustrated in the drawings, there are twelve of the longitudinal flues 7, and each of these fines is provided with four off-take connections 25. It will be understood, however, that the number of flues may be widely varied, according to the size of the leer, and that more or less offtake connections may be provided for each flue. The valves or dampers 29 of each set preferably operated as a unit by any suitable means, such as indicated at the upper right-hand portion of Figure 2, in which a number of one set of these valves are shown as having connections 30 to a rock shaft 31 which may be operated in any suitable manner (not shown) for the purpose of moving the valves of that set in unison. It will be understood that each of the four transverse sets of valves may be operated in unison in a similar or in any suitable manner. a

By the provision of the plurality of oiltake connections, the temperature of different portions of the muflle chamber may be accurately regulated as desired.

The leer end portion of the leer may be of any usual or suitable construction, the glass plates to be annealed being pushed or conveyed through the mufile and into the lower end in any suitable manner and by any suitable means, forming no part of the present invention.

The advantages of our invention result from the provision of a muflle chamber whose 4 upper wall is formed by a series of heating flues, together with means for regulating the heating action of the fines. The construction is a simple and comparatively inexpensive one, no heating chamber or heating flues being required at the sides of the mufile.

We claim:

1. A plate glass annealing leer having a mufile chamber whose upper wall contains a plurality of longitudinally extending heating flues, and means in each of said flues for producing combustion therein, substantially as described.

' mufiie c amber whose upper wall contains a plurality of longitudinally extending heating fines, together with a separate combustion chamber for each of said flues, substantially as described.

3. A plate glass annealing leer having a mufiie chamber whose upper wall contains a plurality of longitudinally extending heat; ing flues, together with a separate combustion chamber for each of. said fines, and

means for producing combustion in each of said chambers, substantially as described.

4. A plate glass annealing leer having a mufile chamber whose upper wall contains a plurality of longitudinally extending heating flues, each of said flues having a plurality of ofi-take connections extending from different points of its length, substantially as described.

5. A plate glass annealing leer having a muflie chamber whose upper wall contains a plurality of longitudinally extending heating flues, each of said flues having a plurality of oil-take connections extending from different points of its length, and each of said connections having valve or damper means, substantially as described.

6. A plate glass annealing leer having a muflle chamber whose top wall contains a plurality of longitudinally extending heating fiues arranged side by side, each of said heating fines having a plurality of off-take connections at difierent'points in its length, a series of transverse flues into which said connections lead, and a stack flue into which the transverse fines discharge, substantially as described.

7. A plate glass annealing leer having a mufile chamber whose top wall contains a plurality of longitudinally extending heating flues arranged side by side, each of said heating flues having a plurality of off-take connections at different points in its length. a series of transverse fines into which said connections lead, and a stack flue into which the transverse flues discharge, each of the oil-take connections having a controlling valve or damper, substantially as described.

8. A plate glass annealing leer having a mufile chamber whose top wall contains a plurality of longitudinally extending heating fiues arranged side by side, each of said heating fiues having a plurality of oft-take connections at different points in its length. a series of transverse flues into which said connections lead, and a stack flue intowvhich the transverse flues discharge, each of the -oft-take connections having a controlling valve or damper, said dampers being arranged in sets, and means for separately operating the dampers of each set, substantially as described.

9. A plate glass annealing leer havin a mufile chamber at the oven end and a eer end in line with the muflle chamber and communicating therewith, the top wall of the muflie chamber having therein a plurality of longitudinally extending heating flues, substantially as described.

10. A plate glass annealing leer having a muflle chamber at the oven end and a leer end in line with the mufile chamber andcommunicating therewith, the top wall of the mufiie chamber having therein a plurality of longitudinally extending heating fiues, together with separate heating means for each of said flues, substantially as described.

- 11. A plate glass annealing leer having a mufile chamber at the oven end and a leer end in line with the muifle chamber and communicating therewith, the top wall of the mufiie chamber having therein a plurality of longitudinally extending heating flues, together with separate heating means for each of said flues, and a pluralit of controllable off-take connections to eac of the heating flues, substantially as described. 12. A plate glass annealing leer havin a mufile chamber whose top wall is provided with a plurality of heating flues and whose rear end wall has a plurality of combustion chambers each of which communicates with one of said fiues, and means for roducing combustion in each of said cham ers, substantially as described. I

13. A plate glass annealing leer havin a muflie chamber whose top wall is provi ed with a plurality of heating fluescand whose rear end wall has a plurality of combustion chambers each of which communicates with one of said flues, and means for producing combustion in each'of said chambers, together with means for independently regulating the combustion in each chamber, substantially as described.

14.. A plate glass annealing leer having a mufile chamber provided with a plurality of longitudinally extending heating flues at -its upper portion, a separate combustion chamber for each of said flues, and means whereby each of said combustion chambers may be supplied with different kinds of fuel, substantially as described.

15. A plate glass annealing leer having a mufiie chamber whose upper wall contains a series of longitudinally extending heating flues arranged side by side, means for suspending said lines from the frame of the furnace, and meansin each of said flues for producing combustion therein, substantially as described.

16. A plate glass annealing leer having a muflier whose upper wall contains a plurality of longitudinally extending heating flues, each of said flues being formed of tile members, key blocks suspending the tile members, means for suspending the key blocks from the frame of the furnace, and means in each of said fines for producing combustion therein, substantially as described. p

17. An annnealing leer havin a muflle chamber at the oven end and a eer end in line with the muffle chamber and communicating therewith, the top wall of the muflie chamber having therein a plurality of longitudinally extending heating fiues, substantially as described.

18. In a leer, a muffle chamber and a leer end adapted to have material move progressively therethrou h through changing temperature zones, tie top wall of the muflie chamber having therein a plurality oflongitudinally extending heating fines, substantially as described.

19. An annealing leer having a mufile chamber at the oven end and a leer end in line with the muflie chamber and communicating therewith, the top wall of the muflle chamber having therein a plurality of longitudinally extending heating flues, at least one of the heating fiues having means at different points in the length thereof for the ofitake of products of combustion, sub-' stantially as described.

20. A11 annealing leer having a muflie chamber at the oven end and a leer end in line with the muffle chamber and communicat'm therewith, the top wall of the muflie chamber having therein a plurality of longitudinally extending heating flues, at least one of the heating fines having a damper controlled ofi'take leading therefrom to control the oiftake of heating gases, substantially as described.

In testimony whereof, we have hereunto set our hands.

EDWIN E. MILNER. WILLIAM J. LYTLE. 

